Rainbow-electronics MAX789 Manual do Utilizador descarregar pdf

___________Product Selection Guide

_______________General Description

The MAX787/MAX788/MAX789 are monolithic, bipolar,

pulse-width modulation (PWM), switch-mode, step-down

DC-DC regulators. Each is rated at 5A. Very few external

components are needed for standard operation because

the power switch, oscillator, feedback, and control circuitry

are all on-chip. Employing a classic buck topology, these

regulators perform high-current step-down functions.

The MAX787/MAX788/MAX789 have excellent dynamic

and transient response characteristics, while featuring

cycle-by-cycle current limiting to protect against overcurrent

faults and short-circuit output faults. They also have a wide

8V to 40V input range.

Each regulator is available in a 5-pin TO-220 package.

These devices have a preset 100kHz oscillator frequency

and a preset current limit of 6.5A. See the MAX724/

MAX726 data sheet for more applications information.

_______________________Applications

Distributed Power from High-Voltage Buses

High-Current, High-Voltage Step-Down

Multiple-Output Buck Converter

MAX787/MAX788/MAX789

5V/3.3V/3V 5A Step-Down, PWM,

Switch-Mode DC-DC Regulators

________________________________________________________________

Maxim Integrated Products

GND

SENSE

CASE IS CONNECTED TO GROUND. STANDARD PACKAGE HAS STAGGERED LEADS.

CONTACT FACTORY FOR STRAIGHT LEADS.

5-PIN TO-220

FRONT VIEW

MAX787

MAX788

MAX789

__________________Pin Configuration

220µF

GND

2.7k

0.01µF

OUTPUT

5V AT 5A

SENSE

50µH

MBR745

470µF

INPUT

8V TO 40V



MAX787



STEP-DOWN CONVERTER

__________Typical Operating Circuit

Call toll free 1-800-998-8800 for free samples or literature.

19-0182; Rev 3; 9/95

___________________________Features

♦ Input Range: Up to 40V

♦ 5A On-Chip Power Switch

♦ Fixed Outputs: 5V (MAX787)

3.3V (MAX788)

3V (MAX789)

♦ 100kHz Switching Frequency

♦ Excellent Dynamic Characteristics

♦ Few External Components

♦ 8.5mA Quiescent Current

♦ TO-220 Package

______________Ordering Information

PART V

OUT

(V) I

OUT

MAX (A)

MAX724 Adjustable 5

MAX728 3.3 2

MAX726 Adjustable 2

MAX727 5 2

MAX787 5 5

MAX788 3.3 5

MAX789 3 5

MAX729 3 2

PART

MAX787CCK

MAX787ECK

MAX788CCK

MAX788ECK

-40°C to +85°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

5 TO-220

-40°C to +85°C

0°C to +70°C 5 TO-220

5 TO-220

MAX789CCK

MAX789ECK -40°C to +85°C

0°C to +70°C 5 TO-220

5 TO-220

1 2 3 4

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Página 1 - Switch-Mode DC-DC Regulators

___________Product Selection Guide_______________General DescriptionThe MAX787/MAX788/MAX789 are monolithic, bipolar,pulse-width modulation (PWM), swi

Página 2

MAX787/MAX788/MAX7895V/3.3V/3V 5A Step-Down, PWM,Switch-Mode DC-DC Regulators2 _______________________________________________________________________

Página 3

MAX787/MAX788/MAX7895V/3.3V/3V 5A Step-Down, PWM,Switch-Mode DC-DC Regulators_________________________________________________________________________

Página 4 - 5V/3.3V/3V 2A Step-Down, PWM

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses arei

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Rainbow-electronics MAX789 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Sensores Rainbow-electronics MAX789. Rainbow Electronics MAX789 User Manual Manual do Utilizador

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